Spring-pullback for haystackers



1. H'. COPE.

SPRING PuLLBAcK FOR HAYSTACKERS.

e 'g/y au New l. H. COPE.

PeIenIed Feb.1o,192o.

2 SHEETS-sneer 2.

. :JOSEPH II.- COPE, 0F DENVERQCOLORAD.

- .SPRING-FULDA@ 15,03 HAYSTQKRS" y To all whom t mag/concern:

Bev it lmownthatL. Josn'PH H... Corn, a

citizen-of the United States5 residingat the city and county of Denver andjState Yof Colorado, have inventedfcertain new and useful Improvements SpringPullbacks for. I-Iaystackeijs; andV I do4 declare the fol.- lowing vto 'beja'fulL 'clean' and exact descriptionv of the invention,v `such asv will'r enable others-skilled inthe art to which it appertainsl to make and use the jsanie, reference bei-ng had to the accompanying drawings, y

'links which slidahly engage the pivoted bars of the. stacker head; servel `to, distend'or- 'stretch .spiralv springs, wherebythe said'bars f andthe kstacker head are'actedj Iuponjdu'e to and to thecharacters of reference marked thereon-,which form a part of this specication.' v Y My invention Vrelates to improvements in 'means for automatically'initiating the return movement 'of' the stacker YV head in hayf stackers, my object'beingto provide a simple and economical construction which shall effi'f ciently perform the aforesaidv function. VIn haystackers of the` class to which this inven-V tion applies, the stacker headpwhich carries jthe loadfis" secured to bars which are pivot- Yally connected lwitlrthe'stationary part of the frame and duringthelifting of a quantityof'ha'yor other material, the headl is raised and at the timejit unloads, these bars Awhich'carry vthe head-have usuallypassed the verticalv positioninjthe'direction ofthe lifting travel and consequently some Ameans must be employed to reverse* the :movement I of the 'head luntil it v.has passed thevertical or dead center iposition-inYthe opposite' di.- rection, in orderJ thatitl mayautomatically returnv toiits lowermost onnormal position.

Heretofore various: construtions have beenk employed for` accomplishing this function,

' Y My present improvement has an important advantage due to the` fact that it is" exceedf ingly si'mple- "in N construction and' conse1 lquentl'y very inexpensive; 'It is. particularly adapted for usein connection withsofcalled extension, armV stackersj'of theieonstruction 45 set forth' in my foini'er Letters PpatentNo. 701,257- dated May 2in-*1902;V vInthe ycon/- struction of the last named patentglinks which are' .pivotally `connected with the staftionary frame workof'thestacker, areso arranged that theyl actupon thejloarsuwhichv carry-the vstacker head,- .to extend' the head,

as'the latter is elevated:'Infthe drawi ng" I have illustratedthe speciicgconstruction dis'f closed" inmy former Patent V'No. 924,534

s Specification of Letters Patent.-

; Patented-Feb. 10,1920@= ,Y `Appiiiatiem fue@ Mariani, 1917.2' seriai Np. 151,811;

dated June 8.1909', ,the Said .links .being arfran'gedfto slide upon the barscarrying'the stacker head until they reach a stopja's'a spring pull'flo'ack is the san-ie whether the 'head is extended or not. f

In myiniprovement thev extremities of the therecoil ofthesprings, to' impart Vthe necessary 'reverse movement afterthe stacker ghead ha'sureachedfits limit of'niovement for reference being made to the accompanying drawing-inwhichis illustrated an er'nloodi- `ment thereof. this drawingy Figurel is'a'side elevation ofa'hayf v'stacker equipped with myimprovementk v "head1 isfrequired," but the ynecessity for the;y

Fig. 2 is a fragmentary detail view kshow; ing one Vpair of pu'llbacl: springs', attached to the structure. This is a view looking in thej direction of l arrow` Fig.. l vsvfith'jthe parts shown on aglargerrscaleg f Fig.- 3 isa view of these vsprings distende@ or placed undertens'ionjas'vis their condition f when the stacker head has completed-'fits 'travelfin the direction "for lifting' and dis-1 charginglits load'.A4 This is a view looking-inrv the` 'direction of.' 'arrowl` 3, lFig. e, the `parts 'being shown on'alarger scale.' l Fig. 4 1s a view ofthe lstrueturej'shown in Fig. :l when inthe jelevateilj` position and with the pull-backj springs kdistended for placed under'tension.' v L v Fig. 5 is a fragmentary side elevation'of 'i' astacker! equip 'ed withl a 'slightlyv modified form-of construction. l 'Eig 6 1s .a fragmentary sideview ,illus` trating another form` of construction. A'

The same reference charactersy indicate the i sameY all the views.Y Y Y Referri jg first to Figs; 14 toe inclusive,

let the numeral designate the relatively sta.

tionai'y Bottom, frame ,harsof Va haystacker,

and '6' 'the uprightloarsat 'the Yrear extremity of the frame and which are rigidly secured thereto as shown at 7 and 8, the rear portion of the bars being reinforced as shown at 10. To the part of the frame, lifting bars 9 are pivotally connected as shown at 12 and extend forwardly therefrom to a position underneath the rear part of the stacker head 13, the latter being rigidly se-` y cured to bars 14which are arranged above the bars 9 and are free toy slide thereon for the purpose of projecting the stacker head outwardly during the lifting movement. In

order to extend the stacker head, links 15 are employed one extremity of each beingpiv-V otally connected Vas shown at16 to a bracket 17 which is secured tothe upright frame bar iframe bars 14 are each provided with a` number of perforations 20 in any one of vwhich a bolt or pin may be inserted which will Vlie in the path of the projection 19 during the lifting movement of theV stacker fh'ead, the position Vof the stop :bolt or pin depending upon Y the vdegree of` extension whichitisfdesired to impart to the stacker head duringlthe ,lifting movement.

My present improvement'as disclosed in Figs. 1v to 4, consists specifically of two Vspiral Asprings 21 eachof which is connectedA at one extremity as shown at 22 with a pin 23 which is secured tothe adjacent bar k9, the opposite extremity of each spring being connected as shown at 24 with a'pin 25 which is mountedV on abracket 26,' the latter having depending lugs 27, the said bracket being I arranged to slide freely on the bar 14'. Hence,

during the lifting movement of the stacker head the projections 19 of the links 15,'will i travel along the bars 14 :until these projec.- tions19- engage a stop pin or bolt mounted infa Vperforation 20 ofthe corresponding A Ybar 14,-whereby the bars 14 will be projected outwardly on the bars `9 whereby the stacker" head will be extended. During'this outward or extended movement of Vthe bars 14 on the bars9, the extremity 28vof each link 15 will vengage the bracket 26 with which the springs 21 are connected, and cause the said brackets to move along the adjacent surfaces of the bars-'14, whereby the springs 21V are distended'or placed under Itension by the time the stacker head reaches its limit of liftingand rearward travel as illustrated in Fig. 4.. As soon as the power acting to ele-- vate the stacker head through the medium of the. lifting bars 9` andthe bars 14 connected with said head, ceases to act, the recoil of thesprings 21, will cause the bars 14 and the head 1 3 tomove in the reverse direction until they have passed the vertical or dead center position, after which they will return by gravity to their lower-most or normal position.

Assuming that it is not desired to elevate the stacker head, as when beginning the `stack and when the stack is low,y the stop pins orbolts will notbe employed in the perforations 20 of the bars 14 of the stacker head and consequently the extremities 28 of vthe links 15 will move outwardly on the bars 14 until they engage the vbrackets 26, and

the springs 21 will be distended or stretched during the remainder ofthe liftingmovement. Y It will thus be understood that the springs v21will be placed under tensionby the time thestacker head .has reached its limit of travel for elevatingand discharging the load, to such an extent that their recoil actionfwill impart thereverse movement to the head and .barsv 14 until thev have passed the vertical or dead center position.

In the form of construction shown in Fig.

5, the springs 29 are employed, being substantially of thek same construction as the springs 21. However, these springs 29 are connected as shown at 30 with the members 1S ofthe links 15, whereby the springs are carried along with the links during the upward movement of the lifting'y frame bars 9 andthe bars 14 arranged'in slidablerelation therewith. The free extremities, however, of the springs 29 'are equipped with Y hooks Sl'which areadapted to engage stop pins 32 carriedby the pivotedlifting bars 9, whereby the f hooked extremities Vof the springs are Vprevented from further movement, thus 'distending the springs. 29 during f the remainder of the lifting travel ofthe stacker head, it being assumed that the "pro-` jections 19 of the members 1 8'arein engagement with stop pins 33 plied to the bars 14.

It should be explained that they stretching or distending action ofthe4 springs 21 or 29 as the case may be,"should notJ commence until the lifting travel ofthe stacker head is Inearly. completed, since the springs vwillbe which have been apquickly. distended or stretched sufficiently y to perform their function Vof imparting sufiicent reverse movement to the stacker head vand thebars .14 to `.cause theseV elements to move in the vreverse direction beyondV the vertical or dead center position after .which they together with thearms 9 returnv by gravity to their lower-most position.

i Asillustrated in Fig. 5, the V'normally free extremities offthe springs 29 are supported in positionV toengagethe stop pins r2,.by weakv vsprings 34 `which are connected as site extremitiesv being connected Withr the hooks 31 of the springs 29. It will be understood that any suitable means maybe employed for holding the hooked extremities shown at .B5-with. the links-15, their oppof of the` springs 29' in positionV to.` engage the stop pins 32. l p

In* the form 'of construction vshown in Fig. 6,.j it isf assumed" thatl the bars 14 ofthe stacker head arek causedtov slide' upon the Vsprings 21 'are' suiiicientlydistend'edy to' enable their" recoil action to impart the necessary rearward movement to the .pivoted lifting structur'e` as' lheretofore explained.A In Fig two positions are illustrated, .one

in full lines andthe'other in dottedV lines,`

the latter Ibeing the position ofthe parts when the springs are disten'd'ed or placed under tension' forA the performance-i of the pull-back function) f Attention is"A called tothe fact that in theY forms of construction shown in' both' Fig.' 1 and Fig. 5,' the springs" 21lor 29 as the ease may be, are placed under ltension by virtue of themovement'of vthe links l'during the lifting operatiomwhether or not the arms lt'carrying the 'stacker head are extended by the action of the links, since-thestretching or distending of the springs isduefto the movement of the links and does notnecessarily involve the movement of the arms lll and the stacker head. On the contrary in the form of construction shown in Fig. 6, it is necessary that the arms 14: have relative longitudinal movement independently of the arms 9 in order that the springs 21 may be distended or placed under tension. Hence this last named fo'rm of construction provides for a case in which links 15 or other similar elements are not employed for extending the stacker head.

Having thus described my invention, what I claim is: V Y

1. A haystacker having a frame member and a structure pivotally mounted to oscillate, the latter comprising a pivoted Amember and a second member mounted upon and adapted to travel in a direction lengthwise of the first named member, a spring connected with one of said members, and a link slidably connected with one of saidmembers and adapted to place the spring under tension during the lifting operation.

2. A stacker comprising a structure pivoted to oscillate, said structure including two members, one being Vpivoted and the other being movable in a direction lengthwise of the first, and a spring extending between the two members, said spring being fixed at one extremity to one member while its `other extremity is relativelyfmovablea Y predetermined distance ontlreil other 'meine' ber, and means having a relat'ivelyjstation-kl ary portion and a'relat1vely movablev portionl` for engaging yand checking the travel ojf'the n movable" extremity of the f spring on` the 'aud-l t jacentmember tocause ittomove with the adjacent lmember' whereby the spring is dis"- tended.

3'. A haystackercomprising'alpivoted lift?l ing frame, a second frame' carryingf the stacker head and movable independently :of

to the second Amember during the lifting; f

movement of the stacker. head whereby the spjringis placed underv tension for 'the' purpose' set forth.

4'.- A haystacker:comprisinga pivoted liftinggframe, -a second frame. .carryingf the l 'i stacker head and movable independently of the liftingframe,l and longitudinally' ofthe latter, a vspring secu-red tothe liftingfralme at one extremity while 'its opposite Y extremity is connected with ,the secondfr'ame, and me'ansl foi` extending the; second.` frame relatively to -theliftingframe.V l f 5. A ,stacker including, a p ivoted liftin frame', a stackerv head frame movable onthe lifting.yframe,..a spring membe'r -having one. extremity secured tothe lifting frame while its opposite'extremity is movable with relation to the stacker head frame, and alink member pivoted above the* stacker head'- l frame when at its lowest limit of movement, the opposite extremity of thelink Vmember being slid'able on the stacker head Vframe and adapted lto engage the extremity of the spring member which is normally movable l on the stacker head frame, and stop said movementduringa predetermined period of` lifting frame while its opposite extremity is l connected with a bracket slidable on the stacker head frame, and a link member piv-A ,v

otally connected above the said frames when Y' at their lowest/limit of movement, the op,- posite extremity of the said link member being movablel in relation to the said frames during the lifting movement of the stacker, i

and arranged to-engage the Vbracket of thel spring member whereby the latter is placed under tension for the purpose setl forth'.

. 7. A haystacker'having a structure `vcoml Y prising two lifting members pivotally mounted to oscillate Yone beingmovable on the other,'a link pivoted at one'V extremity.-

13ol n While its opposite extremity is slidable on the said structure, and a spring member connected With the said structure and arranged to be placed under tension by the link during lifting movement of the latter. y 8. A stacker having a structure .including two memberspivotally mounted to oscillate one being movable longitudinally of the other, a spring pull-back mounted onV the `said structure, and a link pivoted at one extremity While its opposite extremity is arranged toract on said pull-back to place the sameunder tension during the lifting' v otally mounted to oscillate and composed V,of two members,` one having longitudinal travel on the other, aspring pull-hack'and means on the device adaptedV to place the pull-backunder tension during the lifting movement'of said structure. I i Y 11..A stacker including a framey member, a movable lifting "member, connected with the frame member, aflink member slidingly connected with one of said members, and a spring pull-backV on one'of said members adapted to bei placed under tension through the relative movement of'said members during theJ lifting operation.

12.**A stacker having a pivotally mounted to oscillate vertically, a link member upivotedat one end vWhile its opposite end ismovable longitudinally yof the lifting member, and a spring pull-back connection on one of said members and adapted to be placed under tension through thel medium of the link memberv during'the lifting movement. i

13. A stacker having ya lifting member, la

link memberpivoted at one end While its opposite end is movable longitudinally of the lifting member, and ,a spring pull-back connected to one of saidy members Vand mounted forengagement With the other member to be placed under tension vthrough the medium of the link member during the lifting movement. Y y

14. Astac'ker having a lifting structure comprising a pivoted member and a member longitudinally slidableron 'said ivoted member, a link pivotally mounte at oneY end and slidably mounted at the other end, and a spring pull-back connection between said two vmembers adapted tov be placed under tension through thev medium of the' link during the lifting movement. i l

In testimony whereof I affix my signature, in presence of two Witnesses.

- Witnesses:

MARY HIGGINS, A. EBERT OBRIEN.

lifting member JOSEPH H. 'corn j 

